/*
 * Copyright (c) 1991, 1993
 *  The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *  This product includes software developed by the University of
 *  California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#ifndef _SYS_SIGNALVAR_H_       /* tmp for user.h */
#define _SYS_SIGNALVAR_H_

/*
 * Kernel signal definitions and data structures,
 * not exported to user programs.
 *
 * For 2BSD the parts that did not apply were cut out.
 */

/* signal flags */
#define SAS_OLDMASK     0x01    /* need to restore mask before pause */
#define SAS_ALTSTACK    0x02    /* have alternate signal stack */

/* additional signal action values, used only temporarily/internally */
#define SIG_CATCH       (sig_t) 2
#define SIG_HOLD        (sig_t) 3

/*
 * Determine signal that should be delivered to process p, the current
 * process, 0 if none.  If there is a pending stop signal with default
 * action, the process stops in issignal().
 *
 * This probably should be a routine (assembly) instead of a macro due
 * to the voluminous code generated by all of the 'long' operations.
 */
#define CURSIG(p)   (((p)->p_sig == 0 || \
                        (((p)->p_flag & P_TRACED) == 0 && \
                        ((p)->p_sig & ~(p)->p_sigmask) == 0)) ? \
                        0 : issignal(p))

/*
 * Signal properties and actions.
 * The array below categorizes the signals and their default actions
 * according to the following properties:
 */
#define SA_KILL         0x01    /* terminates process by default */
#define SA_CORE         0x02    /* ditto and coredumps */
#define SA_STOP         0x04    /* suspend process */
#define SA_TTYSTOP      0x08    /* ditto, from tty */
#define SA_IGNORE       0x10    /* ignore by default */
#define SA_CONT         0x20    /* continue if suspended */

#ifdef  SIGPROP
const char sigprop [NSIG + 1] = {
    0,                      /* unused */
    SA_KILL,                /* SIGHUP */
    SA_KILL,                /* SIGINT */
    SA_KILL | SA_CORE,      /* SIGQUIT */
    SA_KILL | SA_CORE,      /* SIGILL */
    SA_KILL | SA_CORE,      /* SIGTRAP */
    SA_KILL | SA_CORE,      /* SIGABRT */
    SA_KILL | SA_CORE,      /* SIGEMT */
    SA_KILL | SA_CORE,      /* SIGFPE */
    SA_KILL,                /* SIGKILL */
    SA_KILL | SA_CORE,      /* SIGBUS */
    SA_KILL | SA_CORE,      /* SIGSEGV */
    SA_KILL | SA_CORE,      /* SIGSYS */
    SA_KILL,                /* SIGPIPE */
    SA_KILL,                /* SIGALRM */
    SA_KILL,                /* SIGTERM */
    SA_IGNORE,              /* SIGURG */
    SA_STOP,                /* SIGSTOP */
    SA_STOP | SA_TTYSTOP,   /* SIGTSTP */
    SA_IGNORE | SA_CONT,    /* SIGCONT */
    SA_IGNORE,              /* SIGCHLD */
    SA_STOP | SA_TTYSTOP,   /* SIGTTIN */
    SA_STOP | SA_TTYSTOP,   /* SIGTTOU */
    SA_IGNORE,              /* SIGIO */
    SA_KILL,                /* SIGXCPU */
    SA_KILL,                /* SIGXFSZ */
    SA_KILL,                /* SIGVTALRM */
    SA_KILL,                /* SIGPROF */
    SA_IGNORE,              /* SIGWINCH  */
    SA_IGNORE,              /* SIGINFO */
    SA_KILL,                /* SIGUSR1 */
    SA_KILL,                /* SIGUSR2 */
};
#endif /* SIGPROP */

#ifdef  KERNEL
#define contsigmask (sigmask(SIGCONT))
#define stopsigmask (sigmask(SIGSTOP) | sigmask(SIGTSTP) | \
                     sigmask(SIGTTIN) | sigmask(SIGTTOU))
#define sigcantmask (sigmask(SIGKILL) | sigmask(SIGSTOP))
#endif
#endif  /* !_SYS_SIGNALVAR_H_ */
